Write as a complex number in the form of a + bi.

a.
-4 + 7i
b.
4 + 7i
c.
7 + 4i
d.
7 - 4i

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?